Lock



Juy' 15, 1930- E. F, SEAMAN 1,770,812

LOCK

Filed June 20, 1928 l' ATTORNEY ,capable of assuming tions.

Patented July 15, 1930 UNITED STATES PATENT oFFicE LOCK Application led.Tune 20,

This invention relates to locks, and is more particularly concerned withportable locks of the pad-lock type 1n which a shackhng element isinserted through an opening and" is held locked against unauthorizedremoval.

An object of the present invention is the provision of a portable lockof this type hav ing a shackling element formed for general applicationand use and presenting an abutment surface ol substantial area resistingwithdraual.

A further object is the provision of a lock having a shackling elementcapable of insertion through locking openings with the shackling elementand the body of the lock different angular posi- Such an arrangementdisposes the body of the lock where it is out of the way and does notpresent an obstruction or an awkward a ppearance.

The invention consists in the constructions, arrangements andcombinations hereinafter described and claimed and is more fullydescribed in the following detailed specifica- -tion which is to be readin -conjunctionwith the accompanying drawings forming part thereo'tl andin which l Figure 1 is a perspective view of a lock constructed inaccordance with the present invention` the toggle shackle being shown iniexed locked position.

Figure 2 is a side elevation of the'lock shown in Figure 1. y

Figure 3 is an end elevation of said lock with the shackle insertedthrough a fastener opening and flexed to locking position and with themain lock body singularlyv disposed relatively to the shackle and itssupporting yoke. l

Figure 4 is a vertical sectional view through the lock in toggle flexedposition, taken on line 4 4 of Figure 2, the links of the toggle beingshown in dotted lines in their Straightened longitudinally alinedposition for insertion t'hrougha fastener opening. Figure 5 is atransverse horizontal section taken on line'- of Figure 4. i

Figure 6 is a fragmentary detail showing the key-receiving locking footof the actuating plunger.

1928. Serial No. 286,785.

Figure 7 is an exploded view of the toggle links and their actuatorplunger.

Figure 8 is a detail of a key be used to operate the plunger.

In'structurally embodying the invention, 55 provision is made of amain'lock body portion l of suitable shape and material which is cored'to provide a central circular bore 2 extending vertically therethrough.The base of body `1 may be faced by a plate 3 60 having its inner facein line with bore 2'prosuch as may .vided with a circularrecess ofgreater diameter than the bore seating a key hole disk 4 having itsedgesheld between plate 3 and body 1 for rotative movement.

The upper face of the body portion 1 in line with the borei-2 is formedwith anl upstanding anchor block 5 centrally bored in alinement with thebore 2 which extends upwardly within the anchor block. At oppo- 70 sitesides of this bore, parallel upstanding wings 6 are provided. Betweenthese Wings and the opposite outer faces of the anchor block, curvedseats 7 are formed to receive the similarly curved feet 8 of anyelongated 7 shackle yoke 9, thevparallel verticalbars 10 of 'which arejoined at their upper ends byl the lcross bar 11 forming an abutmentseat for a shackle in the form of a toggle joint mounted Within the yokebetween its bars 811 10. This toggle joint is formed of comple` mentalpairs of pivotally interconnected links, the upper links 12 of each pairbeing provided with staggered -hinge lugs 13 (Figure 7) .by means ofwhich they are pivotally Si connected to each other and to the upper endof the yoke through a pivot pin 14; The lower ends of the upper links 12and the up.- per ends of the lower. links 15 of each pair havesimilarlyarranged hinge lugs by means 5 of which they are interconnected throughpivot pins 16. The lower free ends of the pairs of interconnected links12 and 15 have similar hinge lugs 17 by means of which they are pivotedto the ear.18, Figure 7, at the 95 upper end of an actuating plunger 19which extends through the bore in the anchor block 5 which bore isalined with the pivot point' 14 at the upper end of the yoke. Theactuating plunger 19 is provided with an oper-l 10U arranged for reversemovement through key controlled means to actuate the locking togglejoint to a fastener locking position.

Accordingly, the bore 2 is provided -with i diametrically opposite slots22 therein extending from the bot-tom plate 3 upwardly to a pointadjacent the top face of thebloc where they are mergedinto an annularrecess 23 forming retaining ledges extending outwardly trom the walls ofthe bore. The lower plunger section 20 is formed with a locking disk 24having op'posed'radially extending arms 25. The diameter of the diskcorresponds with that of the bore 2 and the radial arms 25 are of alength to extend in and slide up and down in the slots 22 and to enterand turn in the annular recess 23 and rest upon and be supported uponthe ledges formed by the lower side-thereof. Be-

1 tween the upper face of the disk 24 and the upper end of the anchorblock within the extension of the bore 2 therein, a coil spring 26encircles the lower plunger section 20 and normally. urges the plunger19-20 downwardly when the arms 25 of its bottom disk are alined with andseat in the Vertical slots 22. The disk 24 will, therefore, normally bepositioned through the spring 26 atz the bottoni of the bore 2 in themainy body 1. In this i position, the toggle joint formed by the pairsot pivotally,interconnected toggle links 12 and `,will be straightenedout so that the pairs of links 1215 are inV longitudinal ailinement witheach other and. with the yoke liiiirs 10. 'l'heret'ore in this positionof the parts, the yoke bars with the longitudinally alined toggle liniksmay be easily inserted tlrrrough a. ii'astener' opening such as theusual hfaisp eye. When; the yoke -and its. tog" eshackle` have thus beeninserted, a key'T as' the key 27, (Figure- S) is inserted through thekey disk 4 and into a correspondingly shaped slot 28 formed iinf theunderside of the locking disk 2:4 ol" the' actuating. plunge-r 20, theslot extending only partway into the disk which is suitably swiveled onthe plunger for rel'ati'v'erotary movement. Upward pressure now appliedto the disk through the inserted key will move the disk 24..and itsconnectedv plunger 19-20 upwardly until the arms reach the upper ends ofthe slots 22. lVhent-his point-is reached; thearms are alined withtheannular recess 23 and the key is given a partial "rotation bringing eum@ m-mq nvm- Hm lower wall of the recessV such against which they are.held by the pressure l of the tensioned coil sprlng 26. As the key isthus rotated, the key disk 4 turns on the plate 3 and the swiveledconnection of the disk 24 with the plunger 20 permits a similarrotatin(r movement independently of the plunger. ihe key may now bewithdrawn and the plunger is locked in its Aupwardly moved position.

This upward increment of lthe plunger flexcs the toggle joints formed bythe pairs of links 12-15 moving the links transversely, and in theconstruction shown, extending them in horizontal alinement to present atransversely extending abutment traversing a. fastener opening such asthe alined slots 29 in the fastener plates 30 (Figure 3) and preventingwithdrawal of the shackle formed by the toggle joint from the fastener.

The extent of upwardmovement of the plunger 19 is pre-figured byreasonof the location of the locking recess 23 to position the plungerpivot- 21 in alinement with the point' of pivotal connection between thelower ends of the yoke bars 10 and the anchor block 5. This alinement ofpoints of pivotal-connection in the locking position of the shackletoggle pern'iitsthe toggle with its supporting yoke and upper plungersection 19 and the main lock body 1 with its anchor block 5 to have arelative angular swinging movement as suggested in Figure 3' so that thebody Aof thelock will assume' a vert-ical or othwith the Yoke to form anawkward obstruction. When it is desired to release the lock, the mainbody portion 1 will be swung' up.` wardly to aline with the yoke, thekey 27 will be inserted through the key disk 4 and into theslotted'bottom disk 24 of the plunger and rotated to aline the arms 25with the bore slots vwhereupon the Vcoil spring 26 will function to movethe plunger 19-20 downwardly straightening the links 1'2-15 of thetoggle joint into longitudinal alinement as shown in dotted lines7Figure 4, and permitting the shackle formed by the toggle joint to bewithdrawn through the fastener opening. j

l A lock constructed as above described has lCl the 'advantage' overpadlocks as heretofore made or proposed in that its shackli'ng eiemen-tmay be inserted through an appropriate openingin a door.rx drawer orother object to be locked, and through a hasp or other fastenerlocated'on the-interior;` so that with a lock of this type, a concealedhasp or other lock can. be used which is not subject to breakage inattempted forcing of the locked art.

Preferably, the under tace of the cross bar 11 of theyoke is oppositelybeveled as at 31, Figure 4; to provide for engagement therewith of theupper ends ofthe linksl 12 in tlfie iiexed transversely extended,positionof any suitable locking mechanism effective to able in linewith said yo e, with its upperv provide for the closing and opening oralining and flexing of the toggle joint may be utilized. The specificconstruction of locking yoke` shackle, plunger and lock body, whilerepresent-ing a preferred embodiment of the invention is intended asillustrative and notl restrictive thereof, the construction beingsubject to modification and adaptation to suit varying conditions ofmanufacture and use within the spirit of the invention and the scope ofthe appended claims.

lVhat l claim therefore and desire to secure b v Letters Patent is l. Alock having, a main body portion,

jointed shackle links mounted externallyA thereon and extendingoutwardly therefrom and supported for movementfroma normal position oflongitudinal alinement permitting their insertion through a fasteneropening to a transversely extended position traversing and-opposingwithdrawal from said opening, key controlled means for moving said linksto and holding them in traversing locking position, and means mountingsaid links externally on said main body portion constructed to permitrelative angular movement between said main .body portion and saidmounting means in the transversely extending locking position of thelinks.

A lock having a body portion, a shackle extending therefromcomprising aplurality of pivotallyy interconnected links pivotally supported atono-free end from said body p'ortion, an actuator mounted in andextending from said body portion'and pivotally connected to the otherfree end of thel plurality of interconnected links to move said links toand from a position of substantial longitudinal alinement permittingtheir insertion through a fastener opening to a flexed nonaliningposition presenting an abutment traversing the fastener opening andpreventing withdrawal of the shackle therethrough, means normallytending to move said actuator to link alining pbsition, and keycontrolled means for moving said actuator to and from a link-'flexingposition locking said shackle in the fastener opening.

3. A lock having a main-body portion, a shackle yoke upstandingtherefrom, a" toggle joint shackle having its upper end'pivotallyattached to said yoke, an actuating plunger housed in said body portionand movend pivotally connected to the lower end of said toggle joint,means normally tending to move said plunger downwardly in said bodyportion to close said toggle joint to a position with its members inlongitudinal alinement with each other and with said yoke to permit theinsertion of the yoke and toggle through a fastener opening, and keycontrolled means for moving said plunger upwardly in said yoke to andhold-ing it in a position expandingthe toggle joint and transverselyextending its members to provide an abutment traversing thefasteneropening and locking the shackle against withdrawal therefrom.

et. A lock having a body portion, a shackle support extending upwardlytherefrom and pivotally joined to said body portion at its lower end, ashackle comprising a pair of linkspivotally interconnected and pivotallysupported at their upper free end on said support, an actuator plungermounted in said body portion for movement in the line of said supportand having its upper end pivotally connected to the lower free end ofthepair of links, means normally moving said plunger downwardly in saidbody portion to straighten said links into substantial longitudinalalinement with each other and with their support for insertionv withtheir support through a fastener opening, land` key controlled means formoving said plunger upwardly to and holding'it in a position flexingsaid links to present a transverse abutment opposingV withdrawal of theshackle links and their support from the fastener opening, with thepoint of pivotal connection of the plunger and links alined with thepoint of pivotal connection of said supportand body portion.

5. A lock having a main body portion, a shackle yoke upstandingtherefrom having its lower ends pivotally, supported from and above saidbody portion, a toggle joint shackle having its upper end pivotallyattached to said yoke, an actuating plunger housed in said body portionand movable in line with said yoke, .with its upper end pivotallyconnected .to the lower end of said toggle joint, means' normally tendinto move said plunger downwardly in said ody portiop to close said togglejoint to a position with its members in longitudinal alinement with eachother and with said yoke to permit the insertion of the teneropening,and key controlled means for yoke and toggle through a fas- ,f

moving said plunger'upwardly in said yoke to and'holding it in aposition. expanding the toggle joint and transversely extending itsmembers to provide an abntmenttraversing the fastener opening andlocking the shackle against withdrawal therefrom, with the point 6. Alock having abody portion and a toggle support exteriorly thereof andextended outwardly therefrom, a shackling toggle having one end pivotedto said support, an actuator connected to the other end of said toggleand extending in theA plane of said support downwardly into said-bodyportion and movable toposition the toggle members y substantially inlongitudinal alinement Within the plane of said support for insertionwith said support through an opening, and' to flex saidtoggle members toextend transversely of the opening. and the plane of said support andoppose, removal of the shackle through said opening, means normallytend- Y ing to move said actuator to toggle alining position, and keycontrolled means for movi ing said actuator to and locking it in toggleexed position. I

7. A lock having a main body portion, a shackle support on theexteriorof said body portion, jointed shackle links permanently mounted on saidsupport externally of the body portion and extending outwardly from saidmain body portion, an actuator connected With said links and extendinginto said body portion, means'normally tending to move said links intopositions of longitudinal alinenient permitting their insertion througha fastener opening, and means for moving said'actuator and links to andreleasably holding them in a position With said links transverselyextended to oppose their Withdrawal through sai-d opening.

8. A lock having a base, a toggle permanently mounted at one endexternally on said base, an actuator connected to the other end of saidtoggle-andextending into` said base, means normally tending to move saidtoggle members to positions substantially in longitudinal alinement forinsertion through a fastener opening, and key controlled meansl formoving said actuator and toggle to and releasably holding them in aposition with said toggle iexed and traversing said opening to opposewithdrawal therethrough.

9. A lock having a main body portion, a shackling toggle permanentlymounted at one end on the exterior of said body portion,

an actuator connected to the other end of said toggle and extending intosaid body portion,"

means normally tending to straighten said toggle to position its membersin substantially longitudinal 'alinement for insertion througha fasteneropening, and key-controlled'me'ans on the. interior of'sai-d bodyportion operable to4 nieve said actuator to' flex said toggle andreleasably to holdsaid actuator in to gle iiexed position..

E LSWORTH F. SEAMAN.

